482 



J. E. MAEPv AND T. EOBEETS 0:S THE 



On the north platform, the Dicranograjotus-shales are seen, dipping 

 as though to pass nnder the calcareons beds, and a small thickness of 

 these occurs on the south side, just at the east end of the platform. 

 Although the t^^o series are there seen in apposition, a small fault 

 must occur along the line of strike, cutting out the greater part of 

 the calcareous beds ; for the summit of the graptolite-shales (the 

 Orthis-argentea zone), the Eobeston "Wathen limestone, and the 

 lower part of the Sholeshook limestone stage are absent. 



(6) RecniiU Beds. — ^e have named these beds after the farm of 

 Redhill, two miles north of Haverfordwest, where a quarry by the 

 roadside shows a good section of the beds, which are also fairly 

 fossiliferous here. (As a general rule, fossils are somewhat scarce 

 in them.) They consist of blue-grey shales, weathering olive-green. 

 In all cases where the Sholeshook limestone is seen, it is found to 

 pass gradually up into these beds by disappearance of the calcareous 

 material. TVe have obtained fossils from the Eedhill beds, at 

 Eedhill, Pelcomb Bridge, and Wolfsdale Well, on the west side of 

 the Western Cleddau ; and at Prendergast Mill, Crundale, and 

 Eobeston "Wathen, on the east side of that river. The list here 

 given shows the principal fossils obtained from these localities : — 



Cheetetes, sp 



Stenopora, sp 



Crinoid, arms of 



Phacops mucronatus, Brongn., vai 



alifrons, Salt. ? 



Brongniarti, Fortl. 



Calymene, sp 



Trinucieus BucMandi, JBai-r 



Ampj-x rostra tus, Sars 



Homalonotus bisulcatus, Salt. 



Encrinurus, sp 



Linguia 



Leptgena sericea, Sow 



tenuicincta, 31' Co^ 



Strophomena rhomboidalis, WihJc. 



Ortliis elegantula, Dahn 



calligramma, Balm 



Modiolopsis? 



Area dissiniilis, Bortl. 



transversa, Bortl 



Holopea concinna, 3/' Coy 



Pleiirotomaria, sp , 



Bellerophon, sp 



Ecculiomphalus Bucklandi, Bortl... 



Orthoceras gracile, Bortl 



Cyrtoceras, sp 





P^O'l^M'l^ 





* I 



11 



The large tract of country west of the Western Cleddau occupied 

 by these Eedhill beds, is due to frequent repetition by folds, and the 



